Ok I am building a box but I don't know what size for a 10 inch sub 800 watts. A friend told me to go with 30" wide 15" tall and 20" deep which gives me about a 4.12 internal cubic feet area what do you guys think?

 

what sub model/make? we need more info in order to provide more help.

 

Audiobahn 10" Model AW102N

 

bump......

 

the dimensions your friend gave you is way to big. that sub's recommended sealed box volume is from 0.50 - 1.25 cu.ft. or 0.63 - 2.33 cu.ft ported.

do you want your box sealed or ported? sealed will give you better SQ over a ported. ported box are louder, but you may lose a little SQ.

 

lol wow. this friend needs to check himself immediately.

 

I was going to flame a little, but then I realized he's using Audiobahn... SQ is about impossible to get with those.

 

Well I got a box it got a few port holes small ones that I can plug if needed so I guess I will give it a try

 

4.1 cu ft is WAY too big for a 10. if you're not careful with the power, it'll bottom rather easily with that big of an enclosure. IMO stick to recommended specs for optimum performance.

 

have you tried the audiobahn website? get their recomendations. then measure your trunk. and think about what kind of music you listen to most of the time. ported boxes will give you a very low and long bass sound, while the sealed will give you a more crisp bass. and what materials are you using to build said box?

 

with the larger sealed box design it will decrease your power handling and be easier to bottom the sub out. Although you will be able to handle more power with one closer to the "smaller" end of the recommended specs. Ported will offer a bump in output and be alot more efficient in the long run. Down side would be proper tuning, need for a ssf (sub sonic filter), and an inproperly tuned box (If you mess up).
I would recommend that you check out obcon or r/t for a prefab box as you seem to be going the easy way. You can get ahold of a box for a single ten for about 33 dollars. I know that the standard for the ones I cary was .75 internal volume and it was 33 dollars from my wholesaler.
I wouldnt recommend trying to plug an old ported box unless you know what the internal volume is. Figuring that up would be your best bet and if it will work then go for it. To figure your internal volume Multipy
Length x Width x Depth / 1728(Equivalent of one cubic foot), if it falls in the range listed for that woofer (after displacement) go for it. Plug it from the inside of the box and make it airtight.

If it is close to the dimension/airspace that you need then seal it and begin loading it up with polyfill until you get the sound you want. and call it a day...

 

the smaller the sealed box, the harder it is to bottom out. the power handling increases too as box size gets smaller.

 

thanx slickrick...you saved me writing that...as you wrote it much more nicely than i woulda

 

damn im dyslexic...Chalk it up to lag '_'
larger box increases ability to bottom out, im slow sue me.

 

heh it happens to the best of us, we mean one thing but somehow brainfart and type out something different.

 

Sounds like your friend needs to learn a few things about car audio.